nrf_log from debug port

RE: nrf_log from debug port

inya_lake — Fri, 21 Apr 2017 16:36:42 GMT

thank you for your answer. It was very helpful.

RE: nrf_log from debug port

endnode — Fri, 21 Apr 2017 16:18:38 GMT

And this page describes which GPIO lines are having TRACE function.

RE: nrf_log from debug port

endnode — Fri, 21 Apr 2017 16:17:04 GMT

I was trying to verify my answer by looking to nRF52 DK schematics and PCB layout but I guess it's true. This tutorial suggests that SEGGER debuggers need these additional lines. I see that IMCU_xxx lines on nRF52 DK are accessible but only through special 10-pin needle connector (not having name printed on PCB, it's close to SEGGER J-Link Atmel MCU, on the way to nRF52832 chip...). So in the end you might be able to combine that with P20/P19 ports but I don't see the way how to do it easily.

RE: nrf_log from debug port

inya_lake — Fri, 21 Apr 2017 16:08:59 GMT

thank you for your answer. I've Segger jlink stand alone programmer and maybe I can use it to get debug logs correct.

RE: nrf_log from debug port

endnode — Fri, 21 Apr 2017 16:01:34 GMT

From what I see here you need 5 additional dedicated lines for Tracing functionality which seems not accessible on P20 debug port of nRF5x DK board with SEGGER J-Link OB. So I'm afraid you cannot use it for Tracing on external nRF52 chip, you would need some more expensive debugging HW probe...